136 results found
    1. Developmental Biology

    Lin28a/let-7 pathway modulates the Hox code via Polycomb regulation during axial patterning in vertebrates

    Tempei Sato et al.
    Genetic analyses reveal that the loss of Lin28a causes axial shortening with mild skeletal transformations via decreased PRC1 at Hox genes, establishing a new pathway in the “Hox code.”.
    1. Developmental Biology
    2. Evolutionary Biology

    Wnt/β-catenin signaling is an evolutionarily conserved determinant of chordate dorsal organizer

    Iryna Kozmikova, Zbynek Kozmik
    Wnt/beta-catenin signaling is essential for the specification of dorsal cell fate in amphioxus, suggesting a common evolutionary origin for the formation of the dorsal organizer in chordates.
    1. Developmental Biology

    Segmentation of the zebrafish axial skeleton relies on notochord sheath cells and not on the segmentation clock

    Laura Lleras Forero et al.
    In contrast to amniotes, zebrafish (ray-finned fish, teleost) centra are formed from specialised notochord sheath cells, and the segmental patterning of these cells is independent of the segmentation clock.
    1. Developmental Biology

    Two FGFRL-Wnt circuits organize the planarian anteroposterior axis

    M Lucila Scimone et al.
    Single-cell RNA sequencing identifies an adult regional gene expression map in planarian muscle that includes two FGFRL-Wnt circuits controlling head and trunk tissue pattern.
    1. Developmental Biology

    Nodal and planar cell polarity signaling cooperate to regulate zebrafish convergence and extension gastrulation movements

    Margot LK Williams, Lilianna Solnica-Krezel
    Nodal signaling regulates gastrulation cell behaviors largely in parallel with planar cell polarity signaling and is sufficient for ex vivo extension of embryonic explants.
    1. Stem Cells and Regenerative Medicine

    Positional information specifies the site of organ regeneration and not tissue maintenance in planarians

    Eric M Hill, Christian P Petersen
    Homeostatic tissue maintenance can occur at locations distinct from the target sites of organ regeneration planarians.
    1. Developmental Biology

    Pitx2c orchestrates embryonic axis extension via mesendodermal cell migration

    Michelle M Collins et al.
    Expression of Pitx2c at the onset of gastrulation drives convergence and extension movements in the zebrafish embryo by promoting downstream pathways affecting chemokine signaling, integrin-ECM interactions, and planar cell polarity components.
    1. Stem Cells and Regenerative Medicine

    Wnt, Ptk7, and FGFRL expression gradients control trunk positional identity in planarian regeneration

    Rachel Lander, Christian P Petersen
    Signaling molecules expressed in overlapping body-wide transcriptional gradients determine central axis positional identity in whole-body regeneration.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Human axial progenitors generate trunk neural crest cells in vitro

    Thomas JR Frith et al.
    Pluripotent stem cell differentiation provides insight into how neural crest subtypes of distinct axial identity are patterned in human embryos.
    1. Cell Biology
    2. Developmental Biology

    The tumor suppressor PTPRK promotes ZNRF3 internalization and is required for Wnt inhibition in the Spemann organizer

    Ling-Shih Chang et al.
    Two cancer related proteins, tyrosine phosphatase PTPRK and ubiquitin ligase ZNRF3, interact to downregulate Wnt receptors, thereby regulating Spemann organizer function during Xenopus development.

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